全缘叶杨桐 quan yuan ye yang tong

Adinandra lutescens Craib; A. phlebophylla Hance.

Trees 5-15 m tall. Young branches grayish brown, glabrous; current year branchlets densely fulvous pubescent; terminal buds fulvous sericeous. Petiole 5-7(-12) mm, appressed pubescent when young but glabrescent; leaf blade oblong-elliptic to oblong-ovate, 8-13 × 3-5 cm, leathery, abaxially pale green, sparsely appressed pubescent or glabrescent, and becoming yellowish green when dry, adaxially dark green, slightly shiny, and glabrous, midvein abaxially elevated and adaxially impressed, secondary veins 12-16 on each side of midvein and raised on both surfaces, base broadly cuneate, margin entire or apical portion undulately denticulate, apex acuminate. Flowers axillary, solitary. Pedicel 2-3.5 cm, thick, recurved, appressed pubescent or glabrescent; bracteoles caducous, ovate to long ovate, 2-3.5 mm, sparsely pubescent. Sepals ovate to triangular-ovate, 1-1.3 × 1-1.3 cm, leathery, outside sparsely pubescent or glabrescent, margin glandular and ciliolate, apex acute. Petals white, broadly ovate to oblong-ovate, 8-10 × 5-6 mm, outside yellowish sericeous along median portion, apex obtuse to acute. Stamens ca. 30, 5-6 mm; filaments 1.5-2 mm, glabrous, basally slightly connate; anthers oblong, 2.5-3 mm, with filiform trichomes, connective exserted. Ovary depressed globose, yellowish brown sericeous, 5-loculed with many ovules per locule; style simple, 3-5 mm, sericeous. Fruit red when mature, ovoid to globose, 1-1.7 cm in diam., many seeded, appressed pubescent. Seeds brown, compressed-reniform, small, shiny. Fl. Apr-May, fr. Sep-Oct.

Forests in valleys or on mountain slopes; 700-1900 m. S and SE Yunnan [Cambodia, Malaysia, Myanmar, Thailand, Vietnam].